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New Srixon ZX Series irons (ZX5, ZX7) and utility (ZX U) launched

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Ever since Srixon fully committed to hard goods in the North American market with the introduction of the original Z-Series irons—which included the now legendary Z745’s—it has continued to push the design and engineering limits of their forged irons. With the new ZX Series, featuring the all-new ZX7, ZX5, and ZX Utility, Srixon is doing it again, promising improved feel, speed, and forgiveness.

More photos of Srixon ZX5, ZX7, and ZX U in the forums. 

The Srixon iron story

When you’ve created a winning formula for irons—or a pizza recipe for that matter—you don’t mess with a good thing. You simply refine it by analyzing your strengths and making them stronger, and that is exactly what the team at Srixon has done.

Although most golfers are only familiar with Srixon irons starting with the Z-45 series, the company has a long history of producing some of the best performing forged irons on the market dating back to the I series in the early 2000s, which included the 302, 506, and the i-701, which was offered in a standard and tour model (featured above).

More photos of Srixon ZX5, ZX7, and ZX U in the forums. 

Srixon ZX-7 7-iron, cavity view

Srixon ZX7 7-iron, cavity view

It was around this time when one of the most obvious design features of Srixon irons started to take a front seat: the Tour V.T Sole. Golfers, and more specifically, fitters, took notice of its performance through the turf.

It has gone through some changes and tweaks over the years resulting in softer lines and smoother edges but the new ZX Series is returning Srixon irons to its roots with a move aggressively angular VT sole, including the well-defined heel and toe notches for improved turf interaction.

This was driven from the consumer level and from players at the highest level on the PGA Tour since the Z745 was so well-loved and stuck around in players’ bags for a very long time (Srixon Z745 modern cult classic?)

“While the new ZX Irons are gorgeous to look down at, it’s the technology inside that’s even more exciting. Hotter faces designed using AI optimization delivers more speed. Meanwhile, varying grooves throughout the iron set give golfers consistent distance control, and forged construction helps them feel incredible at impact.” – Jeff Brunski, Director of Research & Development

Srixon ZX7 irons

This iron is the “meat and potatoes” of the new ZX series and will appeal to any golfer who puts a premium on shotmaking.

The ZX7’s provide a compact squared-off blade profile with a thin topline to frame the ball and inspire confidence for those who prefer workability over maximum forgiveness.

But don’t think the ZX7’s haven’t been designed with some forgiveness in mind—they have what Srixon calls “tour cavity” construction to place mass where it’s needed for feel and acoustics while removing it from other places around the cavity to increase stability in the small forged cavity back. We always have to remember, a clubhead’s mass is essentially fixed based on club specs, so engineers only have so much they can do so they have to get creative.

On the subject of mass concentration, the other piece of technology, which Srixon is using to maximize performance, is tungsten in the toe of the mid and long irons to condense more mass towards the toe for extra stability without having to extend the blade length. Using tungsten isn’t new, but when the goal is to minimize size while maximizing stability, it’s a complete necessity at this point, and Srixon does a great job utilizing it in the irons.

The last part of the “offering greater control” puzzle is progressive grooves through the set. The 8-iron through pitching wedge grooves are sharper, narrower, and deeper to channel moisture and debris away more efficiently at slower speeds to generate more spin and shot-stopping control on approach shots. We have seen this before on wedges, but not on irons from Srixon.

It is small details like the variable grooves that demonstrate just how far engineers are willing to go to give golfers every advantage they can with their players cavity irons.

More photos of Srixon ZX5, ZX7, and ZX U in the forums. 

Srixon ZX5 irons

This is where things get interesting and start moving quickly—and by moving quickly, I’m talking ball speed and computing power!

The Srixon ZX5 has a newly optimized face that has been in the works since the previous Z585 was released. The new MainFrame face has been optimized for every club through the set based on tested strike patterns and was refined using machine learning AKA AI. It is composed of varying thickness patterns, which are all individually milled into each face (made up of grooves and cavities) to expand the COR.

ZX5 irons meld this MainFrame face made of strong and elastic SUP10 steel to the iron’s forged 1020 body to provide feel and elasticity, resulting in ball speed in an iron that appeals to a large group of golfers—and wide appeal is at the heart of the “5” iron line.

Like with any modern “family” of clubs, the new ZX Series gives golfers the opportunity to get the exact performance they want through their set thanks to the designers cleverly allowing models to bend into each other. This is where the ZX5 is the start of the show.

They offer an extremely clean look from address and the topline profile matches closely to the ZX7—square and sharp! Not only that, but the blade lengths and sole widths have all been finely tuned so golfers that do plan to combo will see a smooth transition from one iron to the next and even into the new utility.

Srixon ZX Utility

The ZX Utility is the last member of the ZX line and is the perfect complement for golfers wanting extra height and ball speed from their long irons without having to resort to a hybrid club.

The ZX Utility is smaller than the previous generations and much like the ZX5 offers a more compact and blade-style look at address. Speaking of the ZX5 the construction of the utility closely resembles the iron by combining a SUP10 steel face with a full hollow-body construction using 1020 carbon steel and a tungsten weight located centrally at the rear of the sole to lower the center of gravity.

When all of this is combined with the all-new Srixon Mainframe face we get a utility designed to maximize performance and forgiveness in a club that offers the looks any player will love.

More photos of Srixon ZX5, ZX7, and ZX U in the forums. 

Price, specs, and availability

The Srixon ZX Irons launch in North America starting January 15, 2021, with a stock eight-piece set retailing for $1,299.99 (or $162.50 per club) for both the ZX7 and ZX5 irons in steel. The ZX5 in graphite will be $1399.00 (or $175.00 per club)

The ZX Utility will retail for $219.99 with the stock UST Recoil 95.

ZX7 Specs

The stock steel shaft is the Nippon NS Pro Modus3 Tour 120, and the grip is a Golf Pride Tour Velvet 360.

ZX5 Specs

The stock steel shaft is the Nippon NS Pro Modus3 Tour 105, and the graphite shaft is the UST Recoil 95.

ZX Utility Specs

The stock shaft for the ZX Utility is the (graphite) UST Recoil 95 which also bends well with the ZX5.

More photos of Srixon ZX5, ZX7, and ZX U in the forums. 

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Ryan Barath is a club-fitter & master club builder with more than 17 years of experience working with golfers of all skill levels, including PGA Tour players. He is the former Build Shop Manager & Social Media Coordinator for Modern Golf. He now works independently from his home shop and is a member of advisory panels to a select number of golf equipment manufacturers. You can find Ryan on Twitter and Instagram where he's always willing to chat golf, and share his passion for club building, course architecture and wedge grinding.

9 Comments

9 Comments

  1. Pingback: Best irons in golf of 2022: Top overall performers – GolfWRX

  2. Pingback: Best irons in golf of 2021: Top overall performers – GolfWRX

  3. Pingback: Best irons in golf of 2021: Most technology packed – GolfWRX

  4. Pingback: 2021 Srixon ZX4 irons: The final piece of the ZX puzzle – GolfWRX

  5. Brian

    Nov 17, 2020 at 9:34 am

    Remove the stampings, “Srixon” and “ZX5”, and I’d swear the ZX5 was a Mizuno JPX.

  6. Jim Thomson

    Nov 16, 2020 at 3:07 pm

    Nice review. I have played Z-565s since 2017 and love them. I didn’t upgrade to the 585s because they didn’t seem to be much different than the 565s. I’m really interested in the ZX5s because of the new MainFrame face and the more angular Z-545-like VT sole with the heel and toe notches. As a southpaw I have always had unrequited Z-545 envy (the three worst words in golf are “Right hand only”) but it looks like Srixon has finally reciprocated with the ZX5s.

  7. Paul Runyan

    Nov 16, 2020 at 11:07 am

    I think they achieved the angular look…

    Good luck!

    Looking for a new version of the MP 33 from Mizuno! And a CB.

    Please hurry Vosh!

  8. JP

    Nov 16, 2020 at 11:02 am

    Those irons look great! I’d demo them if I was in the market for new irons. I almost wish I was…

  9. stanley

    Nov 16, 2020 at 9:58 am

    utility looks nice

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Equipment

New Mizuno JPX923 irons: Everything you need to know

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What you need to know: Mizuno is launching the successor to its JPX921 series. Engineers leveraged the company’s custom-fitting program — including data from 350,000 golfers — in the creation of the JPX923 series, which includes five models: JPX923 Tour featuring a new V-Chassis and thinner topline, JPX923 Forged with features Mizuno’s third generation of chromoly forging, JPX923 Hot Metal, JPX923 Hot Metal Pro, and JPX Hot Metal HL all featuring new, faster 4335 nickel chromoly, which is 35 percent stronger than Mizuno’s original chromoly.

Mizuno JPX923 irons: What’s new, key technology

JPX923 Tour

Featuring a copper underlay for “Mizuno feel,” the JPX923 Tour is one-piece Grain Flow Forged in Hiroshima Japan from 1025E Pure Select mild carbon steel. Narrower top line and sole in tandem, more rounded trailing edge for cleaner turf interaction.  Features Mizuno’s new ‘V-Chassis’.

“The goal was to engineer a compact, players cavity back that looked and felt like a muscleback at impact. With the copper underlay and new topline, the JPX923 Tour is right there,” says David Llewellyn.

JPX923 Forged

Mizuno’s third-generation of chromoly forging places a wider milling slot heel to toe in the 4120 chromoly 4 through 7-irons as well as well as a thinner clubface. JPX923 Forged are mid-sized, full body Grain Flow Forged irons with a thinner topline and bevelled sole throughout. The scoring irons (8-GW) also feature more compact design and are forged from 1025E Pure Select mild carbon steel.

“The new JPX923 Forged pulls off two impressive achievements. First it feels more solid even though it’s faster from the face. Second, it looks sleeker with a thinner topline and narrower sole even though it plays more forgiving,” says Chris Voshall, Mizuno’s Director of Product.

JPX923 Hot Metal, Hot Metal Pro, Hot Metal HL

With the JPX923 Hot Metal, Mizuno introduces “4355 nickel chromoly,” which is 35 percent stronger than the original Hot Metal material and allows for an eight-percent thinner clubface. Cup face construction works in tandem with a deep center of gravity for high launch with stopping power.

Mizuno developed Hot Metal Pro, Hot Metal and Hot Metal HL (High Launch) from 175,000 real golf swings recorded via Mizuno’s Swing DNA system and describes the three models as follows.

  • JPX923 Hot Metal Pro is a player’s speed cavity that’s compact, with minimal offset for confident ball-strikers seeking maximum ball speed. It’s suitable for low to mid handicap golfers.
  • JPX923 Hot Metal is a forgiving speed cavity suitable for mid to high handicap golfers. It features a full speed, high stability cavity for straight flight and distance.
  • JPX923 Hot Metal HL is a high launch speed cavity delivering a higher launching option for players with moderate swing speeds or aggressive shaft lean, it’s suitable for mid to high handicap golfers.

What Mizuno says

“The new JPX923 series was planned out with Mizuno’s custom ethos at its core” says David Llewellyn, Director of R&D for Mizuno. “We already offer more than 50 unique shafts within our custom program, by expanding to five iron models, there’s an ideal combination for every type of player.”

“We’re constantly evolving the JPX series based on more than 175,000 unique swings we capture every year on the Mizuno Shaft Optimizer,” says Bill Price, Mizuno’s Director of Fitting. “Recently we’re seeing an increase in the number of players with slightly slower swing speeds being fitted – and a trend to more shaft lean. Hence a slight increase in bounce angles through all the models and the introduction of the Hot Metal High Launch.”

Resident Club Junkie Brian Knudson’s take

Note: GolfWRX has not yet gotten an in-hand look at the JPX923 Tour or Forged irons. 

Mizuno’s Hot Metal HL irons look easy to hit and high flying with their larger sole and longer heel to toe shape. You can see some of the tech that is packed into these irons around the badge like the Harmonic Impact ribs and the Stability Frame. Like you would expect from Mizuno the finish quality and badging all look very good and catch your eye without the need for wild colors.

The Mizuno Hot Metal irons look to be the bread and butter of the lineup. The Hot Metal features a little smaller footprint than the HL, less offset, thinner top line, and narrower sole. The look from address will please most golfers and it is still packed with the technology for easy distance and effortless launch.

Hot Metal Pro irons are the smallest of the three but should still offer a great combination of looks and performance. They are still a little longer from heel to toe while offering the least offset and thinnest toppling of the group. The short irons are shaped really well and the whole set flows great from 4 iron down to the pitching wedge.

What they look like

JPX923 Hot Metal Pro

Mizuno JPX923 Hot Metal

JPX923 Hot Metal HL

Pricing and availability

JPX923 Hot Metal Pro: 4-PW RH and LH
JPX923 Hot Metal: 4-LW RH and LH
JPX923 Hot Metal HL: 5-SW RH only

Tour, Forged will hit retail in February of 2023. Hot Metal models at retail late September.

  • JPX923 Tour/Forged – $187.50 per club
  • JPX923 Hot Metal/Hot Metal Pro/Hot Metal High Launch – $137.50 per club

Loft comparisons to JPX921

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Equipment

Mizuno introduces new JPX Fli-Hi

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Mizuno has today introduced the JPX Fli-Hi in a bid to meet every golfer’s demand for greater playability and easier ball-flighting potential at the longer end of the bag.

“We see a lot of players with moderate swing speeds who hit many of their longer irons the same distance – they just don’t have the clubhead speed or consistency of strike to launch the stronger lofted clubs. The JPX Fli-Hi is designed to give those players more practical distance gaps and consistency of flight.” – Chris Voshall, Mizuno’s Director of Product

The new addition features a 17-4 stainless steel face and 431 SS body in a bid to deliver an upgrade in ball speed, while the bendable hosel allows for adjustments in lie angle.

The clubs feature a lighter crown which allows for a higher ball flight, while a re-engineered Wave Soleplate is designed to increase the effective high ball-speed area of the Fli-Hi’s clubface to deliver more consistent ball speeds.

The JPX Fli-Hi is designed to slot seamlessly in to a set, with the models from #4 to #7 designed to correspond directly to the irons they have been created to replace.

The JPX Fli-Hi range features a graduating profile from fairway wood to hybrid to maximize playability. The 20 degree (#4) has a wider fairway type profile, moving towards a tighter hybrid type shaped 29 degree (#7) with a deeper face.

With a deeper center of gravity than the replaced iron, the JPX Fli-Hi is designed to produce more predictable launch and spin rates, thereby more reliable distance gaps between clubs.

The JPX Fli-Hi hits retail this month and costs $137.50 per club.

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Whats in the Bag

Taylor Pendrith WITB 2022 (September)

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Driver: Ping G410 LST (9 degrees @8)
Shaft: Project X HZRDUS Smoke Green Small Batch 70 6.5 TX

3-wood: Ping G425 MAX (14.5 degrees)
Shaft: Project X HZRDUS Smoke Green Small Batch 80 6.5 TX

Irons: Srixon ZX (3), Srixon ZX7
Shafts: Project X HZRDUS Smoke Black 100 6.5 (3), True Temper Dynamic Gold Tour Issue X100

Wedges: Cleveland RTX ZipCore (46-10 Mid, 52-10 Mid, 56-10 Mid, 60-10 Mid)
Shafts: True Temper Dynamic Gold Tour Issue X100 (46-56), True Temper Dynamic Gold Tour Issue S400 (60)

Putter: Odyssey O-Works Black 3T
Grip: SuperStroke

Grips: Golf Pride MCC, Golf Pride Tour Velvet Cord

More Taylor Pendrith WITBs

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